Founder:
- Shub-Niggurath: +3 faith from unimproved forest tiles, -10% population growth
- Cthulhu: Religion spreads rapidly to coastal cities, faith purchases cost +50%
- Dagon: +1 food, +1 faith, -1 gold from ocean tiles
- Nyarlathotep: +20% research, -10 happiness
- Mi-Go: +2 Production from hills, -25% great people generation
- Elder Things: +2 research from tundra, -1 food from tundra
Follower:
- Cannibalism: +8 food in each city for each city being razed, -10% pop growth
- Death cult: Gain faith each time you raze a city, -50% religious pressure
- Strange Inspirations: +25% to Great Writer, Artist, Musician, Scientist generation, -1 faith per city
- Aquatic hybrids: +1 production from ocean tiles, -50% religious pressure
- Ape hybrids: +2 faith and +1 food from unimproved jungle tiles, -50% religious pressure
- Aklo: Great works of Writing and Music produce +2 Culture and Tourism, -10% research
- Shoggoth servants: May use faith to buy shoggoth units, -2 food per city
- Strange experiments: +20% research, -10% population growth
- Strange artifacts: Trade routes rapidly spread religion, -1 production per city
The -50% religious pressure that a bunch of these have reflects a secretiveness that impedes the spread of the religion.